EP2351939A1 - Cage-equipped rollers - Google Patents
Cage-equipped rollers Download PDFInfo
- Publication number
- EP2351939A1 EP2351939A1 EP09828958A EP09828958A EP2351939A1 EP 2351939 A1 EP2351939 A1 EP 2351939A1 EP 09828958 A EP09828958 A EP 09828958A EP 09828958 A EP09828958 A EP 09828958A EP 2351939 A1 EP2351939 A1 EP 2351939A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- roller
- retainer
- ring
- pair
- connection member
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/30—Parts of ball or roller bearings
- F16C33/46—Cages for rollers or needles
- F16C33/4617—Massive or moulded cages having cage pockets surrounding the rollers, e.g. machined window cages
- F16C33/4658—Massive or moulded cages having cage pockets surrounding the rollers, e.g. machined window cages comprising three annular parts, i.e. three piece roller cages
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/30—Parts of ball or roller bearings
- F16C33/46—Cages for rollers or needles
- F16C33/4611—Cages for rollers or needles with hybrid structure, i.e. with parts made of distinct materials
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/30—Parts of ball or roller bearings
- F16C33/46—Cages for rollers or needles
- F16C33/467—Details of individual pockets, e.g. shape or roller retaining means
- F16C33/4682—Details of individual pockets, e.g. shape or roller retaining means of the end walls, e.g. interaction with the end faces of the rollers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/30—Parts of ball or roller bearings
- F16C33/46—Cages for rollers or needles
- F16C33/54—Cages for rollers or needles made from wire, strips, or sheet metal
- F16C33/541—Details of individual pockets, e.g. shape or roller retaining means
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/30—Parts of ball or roller bearings
- F16C33/46—Cages for rollers or needles
- F16C33/54—Cages for rollers or needles made from wire, strips, or sheet metal
- F16C33/542—Cages for rollers or needles made from wire, strips, or sheet metal made from sheet metal
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C19/00—Bearings with rolling contact, for exclusively rotary movement
- F16C19/22—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings
- F16C19/24—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings for radial load mainly
- F16C19/26—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings for radial load mainly with a single row of rollers
Definitions
- the present invention relates to a retainer-equipped roller mounted in an annular gap provided between an outer circumference of a rotation shaft and an inner circumference of a support member, to support the rotation shaft.
- Patent document 1 Japanese Unexamined Patent Publication No. 2000-74071
- a retainer-equipped roller according to the present invention to attain the object includes a retainer having a pair of ring parts separated in an axial direction and column parts arranged circumferentially at regular intervals so as to form pockets and connect the pair of ring parts, and a plurality of rollers arranged in the pockets.
- the roller has a chamfered part between a roller end face and a roller rolling surface, the column part is positioned on a radial outer side of a pitch circle of the roller, a distance between the circumferentially adjacent column parts is smaller than a diameter of the roller, the pair of ring parts has a pair of projection members projecting such that their tip ends are opposed so as to come close to each other, in circumferentially the same position as the column part, and in a position on a radially inner side of the pitch circle of the roller, and the tip ends of the pair of projection members abut on the chamfered parts provided at both ends of the roller and hold the roller between the pair of ring parts.
- the tip ends of the pair of projection members abut on the chamfered parts provided at both ends of the roller and hold the roller between the pair of ring parts, many rollers can be arranged in the circumferential direction of the retainer while the roller does not fall off in an inner diameter direction of the retainer.
- the column part can prevent the roller from falling off in an outer diameter direction of the retainer.
- the pair of projection members project to the chamfered parts of the roller, and the projection member does not reach the rolling surface, lubricant oil can be smoothly supplied from a radial inner side to a space between the circumferentially adjacent rollers.
- the projection member is mounted on a radially outer side of an inner circumferential edge of the ring part.
- the projection member does not project from the ring part to the inner diameter direction, so that a radial thickness of the retainer can be small.
- the projection members may be individually arranged in the ring part, but it is preferable that at least two circumferentially adjacent projection members among the projection members arranged circumferentially are connected by a circumferentially extending connection member.
- the plurality of projection members can be mounted in the ring part at the same time, so that assembly efficiency can be improved at the time of production of the retainer-equipped roller according to the present invention.
- a notch part recessed in the axial direction may be formed in an inner wall of the ring part opposed to the roller end face, and the connection member may be fitted in the notch part.
- the connection member can be firmly fixed to the ring part.
- connection member may be in the form of an endless ring and extend along a whole circumference of the ring part.
- the connection member since the connection member can be mounted from the radial inner side of the ring by being bent, the retainer-equipped roller can be easily assembled.
- the projection member and the connection member are made of a resin.
- the projection member can be easily produced by injection molding.
- connection member may be in the form of a C and one end and the other end thereof in a circumferential direction may be opposed with a gap open in the circumferential direction.
- connection member since the connection member can be mounted from the radial inner side of the ring part by being reduced in diameter, so that the retainer-equipped roller can be easily assembled.
- the projection member and the connection member are made of a resin.
- the projection member can be easily produced by injection molding.
- connection member may be composed of a plurality of arc-shaped segments, and the plurality of arc-shaped segments may be mounted along a whole circumference of the ring part, and forms an endless ring.
- the connection member may be composed of two, three, four or more members. When the number of the members is two, the member is in the form of a 180-degree arc, and the two 180-degree connection members are combined to form an endless ring body as the connection member and mounted on the ring part.
- the connection member can be mounted from the radial inner side of the ring part, the retainer-equipped roller can be easily assembled.
- the projection member and connection member are made of metal or a resin, preferably, made of metal. When they are made of metal, the projection member can be improved in strength.
- an inner wall of the connection member mounted in the ring part and opposed to the roller end face is axially recessed from a wall surface of the pocket opposed to the roller end face. Since the pocket of the retainer houses the roller, the ring part inner side edge positioned at an edge of the pocket of the ring part is opposed to the roller end face. Thus, since the inner wall of the connection member mounted in the ring part and opposed to the roller end face is recessed from the ring part inner side edge in the axial direction in this embodiment, the roller can be prevented from abutting on the inner wall of the connection member.
- the projection member is tapered such that its thickness is large on its root side and small on its tip end side.
- the projection members appropriately abut on the chamfered parts provided at both ends of the roller, and prevent the roller from falling off in the inner diameter direction.
- the tip ends of the pair of projection members abut on the chamfered parts provided at both ends of the roller and hold the roller between the pair of ring parts, many rollers can be arranged in the circumferential direction of the retainer while the roller is held between the column part and the projection member and does not fall off the retainer. Furthermore, since the pair of projection members projects to the chamfered parts of the roller, and the projection member does not reach the rolling surface, lubricant oil can be smoothly supplied from the radial inner side to the space between the circumferentially adjacent rollers.
- Fig. 1 is a horizontal cross-sectional view and a front view showing a retainer-equipped roller according to this working example.
- Fig. 2 is a vertical cross-sectional view of the same working example, in which some members such as the roller are omitted.
- the retainer-equipped roller in this working example includes rollers 11 and a retainer 12, and used as a bearing for a general planet gear group.
- the roller 11 is basically in the form of a cylinder, such as a needle roller.
- the roller 11 has a chamfered part 13 between a roller end face and a roller rolling surface.
- the chamfered part 13 may be formed into a ring shape by the well-known method.
- each end part of the roller 11 may be formed into a spherically expanded shape although it is not shown, and in this case also, the chamfered part is to be provided between a roller end face and a roller rolling surface.
- a boundary between the chamfered part 13 and a rolling surface 11t is shown by one-dot chain line in Fig. 2 so that a position of the chamfered part 13 can be easily recognized.
- the retainer 12 has a pair of ring parts 14 and 14 apart from each other in an axial direction, and column parts 15 each extending in the axial direction to connect the ring parts 14 and 14.
- the column parts 15 are circumferentially arranged at regular intervals to form pockets between the two circumferentially adjacent column parts 15 and 15.
- the ring part 14 is in the form of a flat and annular disk, and its outer circumferential end is bent at right angles and integrally connected to the column parts 15.
- the ring part 14 and the column parts 15 are formed by machining or pressing and made of metal. Alternatively, it may be made of a resin by machining or injection molding.
- the column parts 15 are circumferentially arranged at regular intervals around a center axis O of the retainer-equipped roller.
- the roller 11 is arranged between the circumferentially adjacent column parts 15 and 15.
- the column part 15 is arranged on a radial outer side of a pitch circle PCD of the roller 11, and an interval between the circumferentially adjacent column parts 15 and 15 is smaller than a diameter of the roller 11.
- the column part 15 prevents the roller 11 from falling off the retainer 12 in an outer diameter direction.
- the pair of ring parts 14 has a pair of projection members 16 projecting from an inner circumferential edge of the ring part so that its tip ends are opposed so as to come close to each other. That is, the projection member 16 projects inward in the axis O direction.
- a circumferential position of the projection member 16 is the same as a circumferential position of the column part 15. Therefore, the projection member 16 is opposed to the column part 15 in a radial direction, and the roller 11 is arranged between the circumferentially adjacent projection members 16 and 16.
- the projection member 16 is mounted in an inner wall of the ring part 14 on a radial inner side of the pitch circle PCD of the roller 11.
- a mounting position of the projection member 16 is on the radial outer side of the inner circumferential edge of the ring part 14.
- the inner wall means the surface of the ring part 14 facing each other.
- Fig. 2 is a cross-sectional view showing a standard state in which an axial center of the roller 11 coincides with an axial center of the retainer 12, and a gap width between one axial end face of the roller 11 and one ring part 14 is equal to a gap width between the other axial end face of the roller 11 and the other ring part 14.
- the tip ends of the pair of projection members 16 abut on the chamfered parts 13 provided at both ends of the roller 11 to hold the roller 11 between the pair of ring parts. That is, although an axial distance of the tip ends of the pair of projection members 16 is smaller than an axial length of the roller 11, it is not smaller than a dimension between both ends of the roller rolling surface 11t.
- Each end of the roller rolling surface 11t is represented by the one-dot chain line. Furthermore, a distance between tip ends of the circumferentially adjacent projection members 16 is smaller than the diameter of the roller 11. Thus, the projection member 16 prevents the roller 11 from falling off the retainer 12 in an inner diameter direction. As shown in Fig. 2 , a projection length projecting from an inner wall 19a of the ring part 14 is a distance to the chamfered part 13 of the roller 11 and does not extend beyond the rolling surface 11t of the roller 11. Therefore, lubricant oil can be smoothly supplied from the radial inner side of the retainer 12 to a space between the adjacent rollers 11.
- Fig. 6 is a vertical cross-sectional view showing a dimensional relationship between the roller 11 and the retainer 12.
- the roller has tolerance in an axial length L k , and a distance L d between the pair of ring parts 14 and 14 is larger than the axial length L k of the roller 11 so that the roller can be rotatably held by the retainer 12, and a gap is generated between the end of the roller 11 and the ring part 14. Therefore, the roller 11 can move freely between the pair of ring parts 14 and 14.
- a tip end 16r of the other projection member is in contact with the other chamfered part 13 and holds the roller 11 between the pair of ring parts.
- a tip end 161 of the one projection member temporality reaches the roller rolling surface 11t beyond the chamfered part 13.
- the part stating that the tip ends of the pair of projection members abut on the chamfered parts provided at both ends of the roller and hold the roller between the pair of ring parts, in the claim of the present invention is included in the above-described standard state. It is to be understood that the working example in which the tip end of the one of the projection members temporarily abuts on the roller rolling surface when the roller is moved to one axial direction is included in the claim of the present invention as long as the tip ends of the pair of projection members abut on the chamfered parts provided at both ends of the roller and hold the roller between the pair of ring parts in the standard state.
- Root parts of the projection members 16 arranged circumferentially are connected by an arc-shaped connection member 17.
- the connection member 17 extends circumferentially around the axis O and its thickness in the radial direction is larger than its thickness in the axis O direction, so that it shows high rigidity against radial external force, and constitutes a partial or whole circumference of the ring composed of a flat thin plate material.
- the connection member 17 and the projection member 16 are integrally connected, while they are formed separately from the ring part 14.
- a notch part 18 recessed in the axis O direction is formed in the inner wall of the ring part 14 opposed to the end face of the roller 11.
- the notch part 18 continuously extends in the circumferential direction along the inner circumferential edge of the ring part 14. Since an inner wall 19b of the notch part 18 is recessed from the inner wall 19a on the outer diameter side, a thickness of the inner circumferential edge of the ring part 14 in the axis O direction is smaller than a thickness of the outer circumferential edge thereof in the axis O direction.
- the connection member 17 is fitted in the notch part 18 and fixed in the inner wall 19b.
- a depth of the notch part 18 in the axis O direction is roughly the same as a thickness of the connection member 17 in the axis O direction.
- connection member 17 in this working example is in the form of an endless ring and extending along the whole circumference of the ring part 14 as shown in Fig. 1 .
- the plurality of projection members 16, 16, ⁇ ⁇ ⁇ can be mounted in the ring part 14 at the same time.
- connection member 17 may be in the form of a C in which one circumferential end is opposed to the other end with a gap 20 open in the circumferential direction as shown in Fig. 3 .
- the gap 20 is a radially extending slit.
- a gap width of the gap 20 is smaller than the distance between the adjacent projection members 16 and 16.
- the connection member 17 can be mounted from the radial inner side of the ring part 14 in such a manner that its diameter is reduced in a step of producing the retainer-equipped roller, so that the retainer-equipped roller can be easily assembled.
- the projection member 16 and the connection member 17 are preferably made of a resin.
- the projection member 16 can be easily produced by injection molding.
- connection member 17 may be made such that two 180-degree arc-shaped segments each shown in Fig. 4 , are formed into a 360-degree ring body.
- the two arc-shaped segments of the connection member are combined and formed into an endless ring and mounted along the whole circumference of the ring part 14.
- the projection member 16 and the connection member 17 may be made of a resin by machining or injection molding
- the projection member 16 and the connection member 17 are preferably made of metal in the case in Fig. 4 .
- the projection member 16 can be improved in strength.
- the projection members 16 are mounted in the ring part 14, and then the rollers 11 are fitted in from the radial inner side, whereby the retainer-equipped roller is completed.
- the ring part 14 and the projection member 16 are elastically deformed, they can be fitted in.
- Fig. 5 is an enlarged view of the cross section of the ring part 14.
- the ring part 14 has a protrusion 21 protruding toward the end face of the roller 11 so as to stride across the circumferentially adjacent column parts 15 and 15.
- the protrusion 21 protrudes from the inner wall 19a toward the inner side in the axis O direction.
- one pocket 22 is formed by the adjacent column parts 15 and 15 and the protrusions 21 provided in the pair of ring parts 22.
- the pocket 22 holds the roller 11 so as to prevent the roller 11 falls off the retainer 12 in the outer diameter direction.
- the protrusion 21 is always interposed between the inner wall 19a of the ring part 14 and the end face of the roller 11, the roller 11 can be prevented from abutting on the inner wall 19a of the ring part 14 and the connection member 17.
- an inner wall 17a of the connection member 17 opposed to the end face of the roller 11 is recessed in the axial direction by a distance L 3 from the protrusion 21 serving as a wall surface of the pocket opposed to the end face of the roller 11.
- the roller 11 can be prevented from abutting on the inner wall 17a.
- the protrusion 21 is not provided and the inner wall 19a of the ring part 14 forms the wall surface of the pocket 22.
- the inner wall 17a of the connection member 17 is to be recessed from the inner wall 19a of the ring part 14.
- the pair of ring parts 14 has the pair of projection members 16 projecting such that the tip ends come close to each other, in circumferentially the same position as the column part 15 and in the position on the radial inner side of the pitch circle PCD of the roller 11, so that the many rollers 11 can be circumferentially arranged in the retainer 12 while the roller 11 can be prevented from dropping off in the inner diameter direction and the outer diameter direction of the retainer 12. Therefore, the retainer-equipped roller in this working example can be high in load capacity.
- the projection member 16 since the pair of projection members 16 project to the chamfered part 13 of the roller 11, the projection member 16 does not reach the rolling surface 11t of the roller 11, so that the lubricant oil can be smoothly supplied from the radial inner side to the space between the circumferentially adjacent rollers 11 and 11.
- a circumferential thickness of the projection member 16 can be larger than a circumferential thickness of the inside support in the patent document 1 which abuts on the rolling surface 11t.
- the thickness (a radial thickness and the circumferential thickness, especially the circumferential thickness) of the projection member 16 may be large in the root side and small in the tip end side although it is not shown in the drawing.
- the projection member 16 is mounted on the radial outer side of the inner circumferential edge of the ring part 14, the radial thickness of the retainer 12 can be small.
- the retainer-equipped roller according to the present invention can be advantageously applied in a rolling bearing.
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Rolling Contact Bearings (AREA)
Abstract
Description
- The present invention relates to a retainer-equipped roller mounted in an annular gap provided between an outer circumference of a rotation shaft and an inner circumference of a support member, to support the rotation shaft.
- Techniques for a retainer-equipped roller having no inner and outer rings is conventionally well known as disclosed in Japanese Unexamined Patent Publication No.
2000-74071 - Patent document 1: Japanese Unexamined Patent Publication No.
2000-74071 - However, the above conventional cage and roller has problems as will be described below. That is, since an outside support is positioned on a radial outer side of the pitch circle of the roller row and an inside support is positioned on a radial inner side thereof, between the adjacent rollers, the problem is that lubricant oil is difficult to flow in a space between the outside support and the inside support.
- In view of the above circumstances, it is an object of the present invention to provide a retainer-equipped roller having high-load capacity and capable of smoothly supplying lubricant oil into an internal space of a retainer.
- A retainer-equipped roller according to the present invention to attain the object includes a retainer having a pair of ring parts separated in an axial direction and column parts arranged circumferentially at regular intervals so as to form pockets and connect the pair of ring parts, and a plurality of rollers arranged in the pockets. The roller has a chamfered part between a roller end face and a roller rolling surface, the column part is positioned on a radial outer side of a pitch circle of the roller, a distance between the circumferentially adjacent column parts is smaller than a diameter of the roller, the pair of ring parts has a pair of projection members projecting such that their tip ends are opposed so as to come close to each other, in circumferentially the same position as the column part, and in a position on a radially inner side of the pitch circle of the roller, and the tip ends of the pair of projection members abut on the chamfered parts provided at both ends of the roller and hold the roller between the pair of ring parts.
- According to the present invention, since the tip ends of the pair of projection members abut on the chamfered parts provided at both ends of the roller and hold the roller between the pair of ring parts, many rollers can be arranged in the circumferential direction of the retainer while the roller does not fall off in an inner diameter direction of the retainer. In addition, the column part can prevent the roller from falling off in an outer diameter direction of the retainer. Furthermore, since the pair of projection members project to the chamfered parts of the roller, and the projection member does not reach the rolling surface, lubricant oil can be smoothly supplied from a radial inner side to a space between the circumferentially adjacent rollers.
- Here, preferably, the projection member is mounted on a radially outer side of an inner circumferential edge of the ring part. According to this embodiment, the projection member does not project from the ring part to the inner diameter direction, so that a radial thickness of the retainer can be small.
- Since the present invention is not limited to the one embodiment, the projection members may be individually arranged in the ring part, but it is preferable that at least two circumferentially adjacent projection members among the projection members arranged circumferentially are connected by a circumferentially extending connection member. According to this embodiment, the plurality of projection members can be mounted in the ring part at the same time, so that assembly efficiency can be improved at the time of production of the retainer-equipped roller according to the present invention.
- Preferably, a notch part recessed in the axial direction may be formed in an inner wall of the ring part opposed to the roller end face, and the connection member may be fitted in the notch part. According to this embodiment, the connection member can be firmly fixed to the ring part.
- While the present invention is not limited to the one embodiment, the connection member may be in the form of an endless ring and extend along a whole circumference of the ring part. In this case, since the connection member can be mounted from the radial inner side of the ring by being bent, the retainer-equipped roller can be easily assembled. In this case, preferably, the projection member and the connection member are made of a resin. Thus, the projection member can be easily produced by injection molding.
- Alternatively, the connection member may be in the form of a C and one end and the other end thereof in a circumferential direction may be opposed with a gap open in the circumferential direction. In this case, since the connection member can be mounted from the radial inner side of the ring part by being reduced in diameter, so that the retainer-equipped roller can be easily assembled. In this case, preferably, the projection member and the connection member are made of a resin. Thus, the projection member can be easily produced by injection molding.
- Alternatively, the connection member may be composed of a plurality of arc-shaped segments, and the plurality of arc-shaped segments may be mounted along a whole circumference of the ring part, and forms an endless ring. The connection member may be composed of two, three, four or more members. When the number of the members is two, the member is in the form of a 180-degree arc, and the two 180-degree connection members are combined to form an endless ring body as the connection member and mounted on the ring part. In this case, since the connection member can be mounted from the radial inner side of the ring part, the retainer-equipped roller can be easily assembled. In this case, preferably, the projection member and connection member are made of metal or a resin, preferably, made of metal. When they are made of metal, the projection member can be improved in strength.
- Preferably, an inner wall of the connection member mounted in the ring part and opposed to the roller end face is axially recessed from a wall surface of the pocket opposed to the roller end face. Since the pocket of the retainer houses the roller, the ring part inner side edge positioned at an edge of the pocket of the ring part is opposed to the roller end face. Thus, since the inner wall of the connection member mounted in the ring part and opposed to the roller end face is recessed from the ring part inner side edge in the axial direction in this embodiment, the roller can be prevented from abutting on the inner wall of the connection member.
- Preferably, the projection member is tapered such that its thickness is large on its root side and small on its tip end side. According to this embodiment, the projection members appropriately abut on the chamfered parts provided at both ends of the roller, and prevent the roller from falling off in the inner diameter direction.
- According to the present invention, since the tip ends of the pair of projection members abut on the chamfered parts provided at both ends of the roller and hold the roller between the pair of ring parts, many rollers can be arranged in the circumferential direction of the retainer while the roller is held between the column part and the projection member and does not fall off the retainer. Furthermore, since the pair of projection members projects to the chamfered parts of the roller, and the projection member does not reach the rolling surface, lubricant oil can be smoothly supplied from the radial inner side to the space between the circumferentially adjacent rollers.
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Fig. 1 is a horizontal cross-sectional view and a front view showing a retainer-equipped roller according to a first working example of the present invention. -
Fig. 2 is a vertical cross-sectional view showing the same working example in which members are partially omitted. -
Fig. 3 is a front view showing a variation of the connection member. -
Fig. 4 is a front view showing a variation of the connection member. -
Fig. 5 is an enlarged view of a cross section of a ring part. -
Fig. 6 is an explanatory view showing a dimensional relationship of the members when the roller is temporarily moved to one axial side. - Hereinafter, an embodiment of the present invention will be described in detail based on a working example shown in the drawings.
Fig. 1 is a horizontal cross-sectional view and a front view showing a retainer-equipped roller according to this working example. In addition,Fig. 2 is a vertical cross-sectional view of the same working example, in which some members such as the roller are omitted. - The retainer-equipped roller in this working example includes
rollers 11 and aretainer 12, and used as a bearing for a general planet gear group. Theroller 11 is basically in the form of a cylinder, such as a needle roller. Theroller 11 has a chamferedpart 13 between a roller end face and a roller rolling surface. Thechamfered part 13 may be formed into a ring shape by the well-known method. Alternatively, each end part of theroller 11 may be formed into a spherically expanded shape although it is not shown, and in this case also, the chamfered part is to be provided between a roller end face and a roller rolling surface. In this working example, a boundary between thechamfered part 13 and arolling surface 11t is shown by one-dot chain line inFig. 2 so that a position of thechamfered part 13 can be easily recognized. - The
retainer 12 has a pair ofring parts column parts 15 each extending in the axial direction to connect thering parts column parts 15 are circumferentially arranged at regular intervals to form pockets between the two circumferentiallyadjacent column parts ring part 14 is in the form of a flat and annular disk, and its outer circumferential end is bent at right angles and integrally connected to thecolumn parts 15. Thering part 14 and thecolumn parts 15 are formed by machining or pressing and made of metal. Alternatively, it may be made of a resin by machining or injection molding. - The
column parts 15 are circumferentially arranged at regular intervals around a center axis O of the retainer-equipped roller. Theroller 11 is arranged between the circumferentiallyadjacent column parts column part 15 is arranged on a radial outer side of a pitch circle PCD of theroller 11, and an interval between the circumferentiallyadjacent column parts roller 11. Thus, thecolumn part 15 prevents theroller 11 from falling off theretainer 12 in an outer diameter direction. - The pair of
ring parts 14 has a pair ofprojection members 16 projecting from an inner circumferential edge of the ring part so that its tip ends are opposed so as to come close to each other. That is, theprojection member 16 projects inward in the axis O direction. A circumferential position of theprojection member 16 is the same as a circumferential position of thecolumn part 15. Therefore, theprojection member 16 is opposed to thecolumn part 15 in a radial direction, and theroller 11 is arranged between the circumferentiallyadjacent projection members projection member 16 is mounted in an inner wall of thering part 14 on a radial inner side of the pitch circle PCD of theroller 11. Here, it is to be noted that a mounting position of theprojection member 16 is on the radial outer side of the inner circumferential edge of thering part 14. In addition, the inner wall means the surface of thering part 14 facing each other. -
Fig. 2 is a cross-sectional view showing a standard state in which an axial center of theroller 11 coincides with an axial center of theretainer 12, and a gap width between one axial end face of theroller 11 and onering part 14 is equal to a gap width between the other axial end face of theroller 11 and theother ring part 14. In this standard state, the tip ends of the pair ofprojection members 16 abut on the chamferedparts 13 provided at both ends of theroller 11 to hold theroller 11 between the pair of ring parts. That is, although an axial distance of the tip ends of the pair ofprojection members 16 is smaller than an axial length of theroller 11, it is not smaller than a dimension between both ends of theroller rolling surface 11t. Each end of theroller rolling surface 11t is represented by the one-dot chain line. Furthermore, a distance between tip ends of the circumferentiallyadjacent projection members 16 is smaller than the diameter of theroller 11. Thus, theprojection member 16 prevents theroller 11 from falling off theretainer 12 in an inner diameter direction. As shown inFig. 2 , a projection length projecting from aninner wall 19a of thering part 14 is a distance to thechamfered part 13 of theroller 11 and does not extend beyond the rollingsurface 11t of theroller 11. Therefore, lubricant oil can be smoothly supplied from the radial inner side of theretainer 12 to a space between theadjacent rollers 11. -
Fig. 6 is a vertical cross-sectional view showing a dimensional relationship between theroller 11 and theretainer 12. The roller has tolerance in an axial length Lk, and a distance Ld between the pair ofring parts roller 11 so that the roller can be rotatably held by theretainer 12, and a gap is generated between the end of theroller 11 and thering part 14. Therefore, theroller 11 can move freely between the pair ofring parts roller 11 temporarily makes its closest approach to one of thering parts 14, a gap width between theroller 11 and the other of thering parts 14 becomes a maximum width L1 (L1 = Ld - Lk) as shown inFig. 6 . Even in this temporal situation, atip end 16r of the other projection member is in contact with the otherchamfered part 13 and holds theroller 11 between the pair of ring parts. In this case, when there is a large difference between the distance Ld between the ring parts, and the roller axial length Lk, and an axial length L2 of thechamfered part 13 is small, a tip end 161 of the one projection member temporality reaches theroller rolling surface 11t beyond thechamfered part 13. - The part stating that the tip ends of the pair of projection members abut on the chamfered parts provided at both ends of the roller and hold the roller between the pair of ring parts, in the claim of the present invention is included in the above-described standard state. It is to be understood that the working example in which the tip end of the one of the projection members temporarily abuts on the roller rolling surface when the roller is moved to one axial direction is included in the claim of the present invention as long as the tip ends of the pair of projection members abut on the chamfered parts provided at both ends of the roller and hold the roller between the pair of ring parts in the standard state.
- Root parts of the
projection members 16 arranged circumferentially are connected by an arc-shapedconnection member 17. Theconnection member 17 extends circumferentially around the axis O and its thickness in the radial direction is larger than its thickness in the axis O direction, so that it shows high rigidity against radial external force, and constitutes a partial or whole circumference of the ring composed of a flat thin plate material. Theconnection member 17 and theprojection member 16 are integrally connected, while they are formed separately from thering part 14. - A
notch part 18 recessed in the axis O direction is formed in the inner wall of thering part 14 opposed to the end face of theroller 11. Thenotch part 18 continuously extends in the circumferential direction along the inner circumferential edge of thering part 14. Since aninner wall 19b of thenotch part 18 is recessed from theinner wall 19a on the outer diameter side, a thickness of the inner circumferential edge of thering part 14 in the axis O direction is smaller than a thickness of the outer circumferential edge thereof in the axis O direction. Thus, theconnection member 17 is fitted in thenotch part 18 and fixed in theinner wall 19b. Here, it is preferable that a depth of thenotch part 18 in the axis O direction is roughly the same as a thickness of theconnection member 17 in the axis O direction. - The
connection member 17 in this working example is in the form of an endless ring and extending along the whole circumference of thering part 14 as shown inFig. 1 . Thus, the plurality ofprojection members ring part 14 at the same time. - Alternatively, the
connection member 17 may be in the form of a C in which one circumferential end is opposed to the other end with agap 20 open in the circumferential direction as shown inFig. 3 . For example, thegap 20 is a radially extending slit. A gap width of thegap 20 is smaller than the distance between theadjacent projection members Fig. 3 , theconnection member 17 can be mounted from the radial inner side of thering part 14 in such a manner that its diameter is reduced in a step of producing the retainer-equipped roller, so that the retainer-equipped roller can be easily assembled. In this case, theprojection member 16 and theconnection member 17 are preferably made of a resin. Thus, theprojection member 16 can be easily produced by injection molding. - Alternatively, the
connection member 17 may be made such that two 180-degree arc-shaped segments each shown inFig. 4 , are formed into a 360-degree ring body. Thus, the two arc-shaped segments of the connection member are combined and formed into an endless ring and mounted along the whole circumference of thering part 14. While theprojection member 16 and theconnection member 17 may be made of a resin by machining or injection molding, theprojection member 16 and theconnection member 17 are preferably made of metal in the case inFig. 4 . Thus, theprojection member 16 can be improved in strength. - The
projection members 16 are mounted in thering part 14, and then therollers 11 are fitted in from the radial inner side, whereby the retainer-equipped roller is completed. In addition, since thering part 14 and theprojection member 16 are elastically deformed, they can be fitted in. -
Fig. 5 is an enlarged view of the cross section of thering part 14. In the case where theretainer 12 is made of metal, thering part 14 has aprotrusion 21 protruding toward the end face of theroller 11 so as to stride across the circumferentiallyadjacent column parts Fig. 5 , theprotrusion 21 protrudes from theinner wall 19a toward the inner side in the axis O direction. Thus, onepocket 22 is formed by theadjacent column parts protrusions 21 provided in the pair ofring parts 22. Thepocket 22 holds theroller 11 so as to prevent theroller 11 falls off theretainer 12 in the outer diameter direction. In addition, since theprotrusion 21 is always interposed between theinner wall 19a of thering part 14 and the end face of theroller 11, theroller 11 can be prevented from abutting on theinner wall 19a of thering part 14 and theconnection member 17. - As shown in
Fig. 6 , under the condition that theconnection member 17 is mounted in thering part 14, aninner wall 17a of theconnection member 17 opposed to the end face of theroller 11 is recessed in the axial direction by a distance L3 from theprotrusion 21 serving as a wall surface of the pocket opposed to the end face of theroller 11. Thus, theroller 11 can be prevented from abutting on theinner wall 17a. In addition, in the case where theretainer 12 is made of the resin, theprotrusion 21 is not provided and theinner wall 19a of thering part 14 forms the wall surface of thepocket 22. In this case, theinner wall 17a of theconnection member 17 is to be recessed from theinner wall 19a of thering part 14. - According to this working example, the pair of
ring parts 14 has the pair ofprojection members 16 projecting such that the tip ends come close to each other, in circumferentially the same position as thecolumn part 15 and in the position on the radial inner side of the pitch circle PCD of theroller 11, so that themany rollers 11 can be circumferentially arranged in theretainer 12 while theroller 11 can be prevented from dropping off in the inner diameter direction and the outer diameter direction of theretainer 12. Therefore, the retainer-equipped roller in this working example can be high in load capacity. - In addition, since the pair of
projection members 16 project to thechamfered part 13 of theroller 11, theprojection member 16 does not reach the rollingsurface 11t of theroller 11, so that the lubricant oil can be smoothly supplied from the radial inner side to the space between the circumferentiallyadjacent rollers - In addition, since a diameter of the
chamfered part 13 is smaller than a diameter of theroller rolling surface 11t, according to this working example in which theprojection member 16 abuts on thechamfered part 13, a circumferential thickness of theprojection member 16 can be larger than a circumferential thickness of the inside support in the patent document 1 which abuts on the rollingsurface 11t. In addition, the thickness (a radial thickness and the circumferential thickness, especially the circumferential thickness) of theprojection member 16 may be large in the root side and small in the tip end side although it is not shown in the drawing. When theprojection member 16 is tapered as described above, both tip end side and root side of theprojection member 16 can appropriately abut on the chamfered part provided at each end of the roller. Therefore, theroller 11 can be appropriately prevented from dropping off in the inner diameter direction of theretainer 12. - In addition, according to this working example, since the
projection member 16 is mounted on the radial outer side of the inner circumferential edge of thering part 14, the radial thickness of theretainer 12 can be small. - While the embodiments of the present invention have been described with reference to the drawings in the above, the present invention is not limited to the above-illustrated embodiments. Various kinds of modifications and variations may be added to the illustrated embodiments within the same or equal scope of the present invention.
- The retainer-equipped roller according to the present invention can be advantageously applied in a rolling bearing.
- 11 ROLLER, 11T ROLLER ROLLING SURFACE, 12 RETAINER, 13 CHAMFERED PART, 14 RING PART, 15 COLUMN PART, 16 PROJECTION MEMBER, 17 CONNECTION MEMBER, 17A CONNECTION MEMBER INNER WALL, 18 NOTCH PART, 19A RING PART INNER WALL, 19B NOTCH PART INNER WALL, 20 GAP, 21 PROTRUSION, 22 POCKET
Claims (11)
- A retainer-equipped roller comprising a retainer having a pair of ring parts separated in an axial direction and column parts arranged circumferentially at regular intervals so as to form pockets and connect said pair of ring parts, and a plurality of rollers arranged in said pockets, wherein
said roller has a chamfered part between a roller end face and a roller rolling surface,
said column part is positioned on a radial outer side of a pitch circle of said roller, and a distance between the circumferentially adjacent column parts is smaller than a diameter of said roller,
said pair of ring parts has a pair of projection members projecting such that their tip ends are opposed so as to come close to each other, in circumferentially the same position as said column part, and in a position on a radially inner side of the pitch circle of said roller, and
said tip ends of the pair of projection members abut on said chamfered parts provided at both ends of the roller and hold the roller between the pair of ring parts. - The retainer-equipped roller according to claim 1, wherein
said projection member is mounted on a radially outer side of an inner circumferential edge of said ring part. - The retainer-equipped roller according to claim 1, wherein
at least two circumferentially adjacent projection members are connected by a circumferentially extending connection member. - The retainer-equipped roller according to claim 3, wherein
a notch part recessed in the axial direction is formed in an inner wall of said ring part opposed to said roller end face, and
said connection member is fitted in said notch part. - The retainer-equipped roller according to claim 3, wherein
said connection member is in the form of an endless ring and extends along a whole circumference of said ring part. - The retainer-equipped roller according to claim 3, wherein
said connection member is in the form of a C and one end and the other end thereof in a circumferential direction are opposed with a gap open in the circumferential direction. - The retainer-equipped roller according to claim 5, wherein
said projection member and said connection member are made of a resin. - The retainer-equipped roller according to claim 3, wherein
said connection member is composed of a plurality of arc-shaped segments, and said plurality of arc-shaped segments are mounted along a whole circumference of said ring part, and form an endless ring. - The retainer-equipped roller according to claim 8, wherein
said projection member and said connection member are made of metal. - The retainer-equipped roller according to claim 3, wherein
an inner wall of said connection member mounted in said ring part and opposed to the end face of said roller is axially recessed from a wall surface of said pocket opposed to said roller end face. - The retainer-equipped roller according to claim 1, wherein
said projection member is tapered such that its thickness is large on its root side and small on its tip end side.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2008299654A JP5296503B2 (en) | 2008-11-25 | 2008-11-25 | Roller with cage |
PCT/JP2009/068507 WO2010061709A1 (en) | 2008-11-25 | 2009-10-28 | Cage-equipped rollers |
Publications (3)
Publication Number | Publication Date |
---|---|
EP2351939A1 true EP2351939A1 (en) | 2011-08-03 |
EP2351939A4 EP2351939A4 (en) | 2012-09-05 |
EP2351939B1 EP2351939B1 (en) | 2015-06-10 |
Family
ID=42225590
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP09828958.0A Not-in-force EP2351939B1 (en) | 2008-11-25 | 2009-10-28 | Cage-equipped rollers |
Country Status (4)
Country | Link |
---|---|
US (1) | US8337092B2 (en) |
EP (1) | EP2351939B1 (en) |
JP (1) | JP5296503B2 (en) |
WO (1) | WO2010061709A1 (en) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP5646846B2 (en) * | 2009-01-28 | 2014-12-24 | セミコンダクター・コンポーネンツ・インダストリーズ・リミテッド・ライアビリティ・カンパニー | Driver circuit |
EP3175133B1 (en) | 2014-07-30 | 2019-10-16 | Koyo Bearings North America LLC | Roller bearing assembly with retainer ring |
JP6613576B2 (en) * | 2015-02-25 | 2019-12-04 | 日本精工株式会社 | Bearing cage and cage and roller |
DE102015212450A1 (en) * | 2015-07-02 | 2017-01-05 | Zf Friedrichshafen Ag | Cylindrical roller bearings |
CN115122177B (en) * | 2022-07-25 | 2023-05-26 | 潮州市潮安区乌洋纸品有限公司 | Environment-friendly corrugated roller and polishing equipment thereof |
Citations (8)
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DE915760C (en) * | 1952-07-01 | 1954-07-29 | Skf Kugellagerfabriken Gmbh | Sheet metal cage for cylindrical roller bearings |
FR1278545A (en) * | 1961-01-31 | 1961-12-08 | Skf Svenska Kullagerfab Ab | Cage for rolling bearings |
GB2102513A (en) * | 1981-07-24 | 1983-02-02 | Nippon Seiko Kk | Roller bearing cage assemblies |
JPH10196659A (en) * | 1996-12-27 | 1998-07-31 | Ntn Corp | Roller bearing |
JP2000074071A (en) * | 1998-08-28 | 2000-03-07 | Nippon Seiko Kk | Cage and roller |
EP1519062A2 (en) * | 2003-09-24 | 2005-03-30 | Ntn Corporation | Roller retainer assembly for planetary gear and planetary gear support using the same |
US20070116393A1 (en) * | 2005-11-22 | 2007-05-24 | Shinji Oishi | Needle roller bearing, crank shaft supporting structure, and split method of outer ring of needle roller bearing |
EP1860336A1 (en) * | 2005-03-14 | 2007-11-28 | Ntn Corporation | Needle roller bearing and method of producing the same |
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US3256052A (en) * | 1963-12-04 | 1966-06-14 | Trw Inc | Roller bearing cage with roller retainers |
JPS4527131Y1 (en) * | 1966-03-10 | 1970-10-21 | ||
US3659912A (en) * | 1970-11-18 | 1972-05-02 | Hudson B Scheifele | A cage and roller unit |
US4003609A (en) * | 1976-03-25 | 1977-01-18 | The Torrington Company | Bearing cage and roller assembly |
JP2975171B2 (en) | 1991-06-26 | 1999-11-10 | ミサワホーム株式会社 | Uneven pattern engraving device for floor column manufacturing |
JP2562728Y2 (en) * | 1992-02-26 | 1998-02-16 | エヌティエヌ株式会社 | Shell type roller bearing |
JP3665653B2 (en) * | 1993-11-30 | 2005-06-29 | Ntn株式会社 | Roller bearing cage and manufacturing method thereof |
JP2001323935A (en) * | 2000-05-18 | 2001-11-22 | Ntn Corp | Roller with cage and reduction gear using the same |
US7311447B2 (en) * | 2003-09-19 | 2007-12-25 | Nsk Ltd. | Roller bearing |
JP4979249B2 (en) * | 2006-03-16 | 2012-07-18 | Ntn株式会社 | Crankshaft support structure |
-
2008
- 2008-11-25 JP JP2008299654A patent/JP5296503B2/en not_active Expired - Fee Related
-
2009
- 2009-10-28 WO PCT/JP2009/068507 patent/WO2010061709A1/en active Application Filing
- 2009-10-28 US US13/129,203 patent/US8337092B2/en active Active
- 2009-10-28 EP EP09828958.0A patent/EP2351939B1/en not_active Not-in-force
Patent Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
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DE915760C (en) * | 1952-07-01 | 1954-07-29 | Skf Kugellagerfabriken Gmbh | Sheet metal cage for cylindrical roller bearings |
FR1278545A (en) * | 1961-01-31 | 1961-12-08 | Skf Svenska Kullagerfab Ab | Cage for rolling bearings |
GB2102513A (en) * | 1981-07-24 | 1983-02-02 | Nippon Seiko Kk | Roller bearing cage assemblies |
JPH10196659A (en) * | 1996-12-27 | 1998-07-31 | Ntn Corp | Roller bearing |
JP2000074071A (en) * | 1998-08-28 | 2000-03-07 | Nippon Seiko Kk | Cage and roller |
EP1519062A2 (en) * | 2003-09-24 | 2005-03-30 | Ntn Corporation | Roller retainer assembly for planetary gear and planetary gear support using the same |
EP1860336A1 (en) * | 2005-03-14 | 2007-11-28 | Ntn Corporation | Needle roller bearing and method of producing the same |
US20070116393A1 (en) * | 2005-11-22 | 2007-05-24 | Shinji Oishi | Needle roller bearing, crank shaft supporting structure, and split method of outer ring of needle roller bearing |
Non-Patent Citations (1)
Title |
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See also references of WO2010061709A1 * |
Also Published As
Publication number | Publication date |
---|---|
JP5296503B2 (en) | 2013-09-25 |
EP2351939A4 (en) | 2012-09-05 |
EP2351939B1 (en) | 2015-06-10 |
WO2010061709A1 (en) | 2010-06-03 |
JP2010127306A (en) | 2010-06-10 |
US8337092B2 (en) | 2012-12-25 |
US20110222811A1 (en) | 2011-09-15 |
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